Machine for making metal screw-covers.



un. 634,764. Patented ont. in, |899. G. RICHTER. HACHINEVFOB MAKING METAL SCREW COVERS.

(Application :ma en -1o, 189s.)V (No Modal.) v n 3 Sheets-Sheet i,

rm: nonms venus co. mom-nwo, Asume-mx. e. c.

Rm 634,764. Patented Oct. IU, i899.

G. RICHTER.

MACHINE FOR MAKING METAL SCREW CUVEBS.

(Application led Dec. 10, 1898.) (No Model.) n 3 Sheets-Sheet 2 No. 634,764'. i Patented Uc't. 10,1899.

nl cHER. 0 MACHINE F08 MAKING METAL SCREW COVERS.

(Appumion am me. 1o, 189s.) (No Model.) 3 Shasta-Sheet 3 numllmlm llllillllllllllillilhl mill-lul i lmmm-1| UNITED STATES PATENT QFEICE.

cusrnv RICHTER., or PFORZHEIM, GERMANY..

MACHINE FOR MAKINGLMETAL SCREW-COVERS.

' SPECIFIGALTIGN forming part of Letters Patent NO.'634,764,'dated October 1,0, 1899. Application iiled December l0, 18.98. Serial No. 698,910. (No model.)

To cir/ZZ whom t may concern:

Be it known that I, GUs'rAv RICHTER, a citizen of the German Empire, residing at Pforzalso to automatically release the drawing or shaping tool, and finally to eject the finished capsule from they machine. AThese and additional objects are attained by the means illustrated in the accompanying drawings, in Which- Figure l is a vertical longitudinal section of this improved machine; Fig. 2, a side View; Fig:3,a plan View; Fig. 4, an end View, While Figs. 5 to l2 show various details, which will be hereinafter more particularly described.

A matrix B is removably mounted in standards b on a recessed part c of the machineframe A, to which matrix the metal blanks which are to be converted into screw caps or capsules C, Fig. l2, are fed through a hopper b. A carriage D travels in guides a' of the frame A, in which carriage a spindle d is loosely mounted in such a way that the transmission of movement from the carriage D to the spindle d takes place byl means of a setring d', mounted on the said spindle, so that the spindle when the carriage D is in its extreme position to the right orthe left, has an independent movement equal vto the distance Fig. l. A drawing-tool or mandrel E is mounted on the spindle cZby means of a nut or the like cl2. The carriage D, and with it also the drawingtool or mandrel E, receives its movement from a crank-shaft F by means of a connecting-rodG and a pivoted lever H, connected at one end with the frame A and at the other end Withthe carriage D. The crank-shaft, FLis ,operated-by means of a beltpulley fi, which serves as a ily-Wheel and isd mounted on a gear-shaft J, said belt-pulley operating gearinge" i2; The Wheel '1.2 is mounted on,but not firmly connected with,the crank shaftF, and is capable of being disconnected therefrom by means of a Wedge K, Figs. 2, 4,

and 6, in abush f, iixed on the shaft F. This wedge is axially adjustable in a slot in the bush j, Figs. fiand 6. The Wedge has two projections lo and 7a', of which the first, k, is

always pressed by means of a spring k2 into one'of a series of recesses (not shown) arranged starwise or radially on the nave of the Wheelt'z, and thus firmly connectin gthe crankshaft F and the Wheel 2. `The other projeca tion le' on the rotation of the crank-shaft F ,encounters an inclined surface l, Figs. 2, 3,

and 4, formed on the arm L of `an elbow-lever L Ll Whenever a cam M, mounted on a shaft m, operated by the gearing 'i4 and i5, Figs.- l, 3, and .4, brings the elbow-lever within reach of the said projection 7.3. By this means the wedge K is so adjusted that the Wheel t2 and crank-shaft F are disconnected by the projection 7c emerging from the nave of the cogwheei '2 and causing the crank-shaft to become stationary so long as the cam M acts on the elbowlever L L', Fig. 5. As soon as this ceases the elbow-lever is returned by means of thespring Z2 into its initial position, Where? upon the spring k2 brings the projection Y.7c again into engagement with the nave of Ithe Wheel L2 and the latteris again connected with the crank-sh afi, so that the saine can be again rotated.

In a guide holder or socket CL2, located on v the frame A, is arranged a hollow rotary spin- 'die N, Figs. l and 2, Which'carries on its end facing the end of the drawing-tool E a second matrix B', while carried on the outer end of said holloiv spindle is a beveled gear-Wheel' a movable clutch member o, Fig. 3, which isl embraced by and has a movable connection at 51 with the forked arms p p2, Fig. 7, of a pivoted lever 52, the remainingarmp of which is acted upon by a cam-disk P on the shaft fm. During the time the shaft F is stationary IOO the arm 2) of the lever 2 is acted upon by the thicker portion of cam-disk Pin such manner as to disengage the movable clutch member 0 from the sleeve orstationary clutch member n2, and consequently there is no rotation of the said hollow spindle N.

The operation of theparts of the machine is so timed, however, that soon as the shaft F is momentarily stopped the movement of the thinner portion of said cani-disk against the end of arm p of lever 52 causes the movable member of the clutch to be acted upon by its spring to engage the stationary membernz, and consequently the spindle is rotated. In this way the matrix B is turned backward until it has automatically screwed itself away from the drawing-tool, whereupon the return movement of the carriage continues and the finished screw-cap is ejected. As the thicker portion of the cam-disk is gradually presented to the end of arm p the movable clutch member is again disengaged obviously.

An ejector Q for the linished capsule is located in the hollow spindle N, Fig. l, which ejector is operated by a cam q, loosely mounted on the shaft O, when the eccentric-pin r, Figs. 9 and l0, mounted on a disk R, fixed on the crank-shaft F, encounters an arm q', connected with the cam q, by which means the ejector is driven forward, thereby ejecting the finished capsule contained in the matriX B'.

The working of the machine is as'follows: The metal blanks thrown into the hopper b' come in front of the matrix B and are forced through the said matrix by means of the mandrel E, moved by the crank-shaft F, in the manner hereinbcfore described, and in this matrix they are drawn into the form of a capsule and provided with an internal thread by means of the screw-thread on the head c of the mandrel E. The capsule C then adheres to the mandrel E as if it were screwed thereon, and is thus forced by the further forward movement of the said mandrel E into the matrix B', where the head-su rfaces c and the milling or edging c', Fig. l2, are formed. The carriage D is then moved backward to the extent indicated at 0c, Fig. l; but the mandrel or drawing-tool does not partake of such movement on account of its end being retained by the capsule in the matrix. Immediately the carriage returns the cran k-shaft is thrown out of operation temporarily by the action of cam M, lever L L', and wedge K in the manner already described.

By the engagement of the clutch or coupling o, Figs. 7 and 8, by means of the camdisk P and the lever p p', the bevel-wheel gearing n n is operated, and therewith the hollow spindle N is then rotated, while the inished capsule C is retained in the matrix B by the milled edge c', so that there-'fore the drawing-tool or mandrel E is-ejected or pushed out of the capsule C by means of the screwthread e. The mandrel E and the spindle d then move over the non-working space JJ, so that Ithus the heavy driving mechanism of the momentary stationarycrank-shaft F does not share in this movement. After the mandrel E is released from the capsule C the coupling o is again disconnected, the hollow spindleN becomes stationary, and the ejector Q is then operated in the manner described and eXpels the finished capsule, which falls into a suitable collecting vessel. At this moment the cam M ceases to act on the lever L Land consequently on the wedge K, and the crankshaft is again coupled with the cog-wheel 2 and the manufacture of a fresh capsule commences.

Instead of causing the second matrix to turn backward when the mandrel E is stationary, and thereby to screw off the capsule from the same, the matrix may be made stationary and the mandrel revoluble, or the mandrel and matrix may have an intermittentor simultaneous movement in opposite directions, and thereby effect an automatic screwing off of the capsule.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim isl. In a machine for making metal screwcaps and the like,the combina tion with adrawing-die for receiving and holding aplanchet, of a movable mandrel or drawing-tool having a threaded end, means for projecting the tool against the planchet in the die to form the screw-cap,a rotatable finishing-die,and means for rotating the same to release the tool from the finished cap. i

2. In a machine for making metal screwcaps and the li ke,the combination with a drawing die for receiving and supporting a planchet, of a movable mandrel or drawingtool having a screw-thread, a reciprocating device for projecting the tool against the planchet in the die to form the screw-cap, the return movement of said device being partly independent of said tool, and a rotatable linishing-die and means for rotating the same to release the tool from the'nished cap.

3. In a machine for making metal screwcaps and the like,the combination with a drawing die for receiving and supporting a planchet, of a mandrel or drawing-tool having a screw-thread, a reciprocating device for projecting the tool against the planchet in the die to form the screw-cap, and also for returning said tool to its first position, a rotatable finishing-die, and means for rotating the same 1o release the tool from the finished cap.

4. In a machine for making metal screwcaps and the like,the combination with a draw` ing-die for receiving and holding a planchet, of a mandrel or drawing-toolhavinga screwthread, and an intermittently-operated reciprocating carriage for projecting the tool against the planchet in the die to form the screw-cap, the return movement of said carriage being partlyindepcndent of said tool, a

IOO

IIO

634,764 f Y l e rotatable iinisliing-die, and means for rotating the same to release the tool from the 'in- Y ished cap.

. Ina machinelfor making metal screw-` caps and the like,the combination with a drawing-die for receiving and vsupporting a planchet, of a mandrel or drawing-tool having a thread, an intermittently-operated carriage for forcing'the tool against the planchet 6. In a machine for making metal screwcaps and the like,the com bination with a draw-- ing-die for receiving and holding a planchet, of a mandrel or drawing-toolhaving athread, an intermittently-operated reciprocating earriage for forcing said tool against the planchet inthe die to form the screw-cap, the return movement of said carriage being partly independent of the tool,and means simultaneously releasing said tool from the finished screwcap and returning the same the extent of such independent movement.

7. In a machine for making metal screwcaps and thelike,the combination with a drawing die for receiving and supporting a planchet, of a' mandrel or drawing-tool having a thread, an intermittently-operating carriage for foreingsaid'tool against the planchet in the die to form the screw-cap, and for cornpleting the return of thetool to its iirst position, the return movement of the carriage being partly independent of the tool, and means simultaneously releasingsaid tool from the finished screw-cap and returning the same the extent of such independent movement.

8. In a machine for making metal'screvvcaps and the like,the combination with a drawing die,l for receiving and supporting a planchet, of a mandrel or drawing-tool having a thread, a reciprocating device for forcing said tool against the planchet in the die to form the screw-cap, the return movement of said device being partly independent of the tool, and means for simultaneously releasing the tool from the iinished screw-cap and returning the same the extent of such independent movement.

9. In a machine for making metal screwcaps and the like, the combination with a matrix or drawing-die for receiving and supportingl a planchet, of a threaded mandrel or drawing-tool, an intermittently-operated recipro- 'eating device for forcingI said tool against the planchet inthe die to form the screw-cap, the return movement of said device being partly independent of the tool, an edging or finishing die into Which the screw-cap is carried by the continued movement of the drawing-tool, means simultaneously releasing the tool from the inished cap and returning the same the extent of such independent movement, and

means for ejecting the finished screw-cap from the said finishing-die.

1Q. In a machine for making metal screwcaps and the like, the combination with a drawing-die for receiving and supporting a plancbet, oi' a threaded mandrel or drawingtool, an intermittently-operated reciprocating device for forcing said tool against the planchet in the die to form the screw-cap, the return movement of said device being partly independent of the tool, an edging or finishing die into which the screw-cap is carried by the continued movement of the tool, means for rotating said finishing-die back- Wardly to simultaneously release the tool from vthe finished cap and return the same the extent of the vindependent movementof said reciprocating device and means for ejecting the nished screw-cap.

11. In-a -machine for making metal screwcaps and the like, the combination with a drawing-die for receiving and supporting a planchet, of a threaded mandrel or drawingtool, an intermittentiy-operated reciprocating device for forcing the tool against the planchet in the die to form the screw-cap, the return movement of said device being partly independentof the tool, a rotatable finishing-die or matrix into Which the screwcap is forced by the continued movement of the tool, and means for rotating said finishing-die to release the tool from the screw-cap and to return the same the extent ofvsuch independent movement.

1-2. In a machine for m akingmetal screwvcaps and the like, the combination with a drawing-die for receiving and supporting a planchet, of the carriage and means for reciprocating the same intermittently, athreaded mandrel or drawing-tool supported by the carriage and having a return movement partly independent of the same, a rotatable sleeve supporting a finishing-die inline with the drawing-die, and means for rotating said sleeve at intervals,substantially as described.

13. In a machine for making metal screvvcaps and the like, the combination with a drawing-die for receiving and supporting a planchet, of the carriage and means for reciprocating the same intermittently, a threaded' mandrel or drawing-tool supported by the carriage and having a return movement partly independent of the same, a rotatable I sleeve supporting a nishing-diein line with `the drawing-die, means for operating said Sleeve at intervals, and an ejector for the finished screw-cap.

le. In a machine for making metal screwcaps and theilike, the combination with a drawing-die for receiving and holding a planchet, the movable carriage, the threaded drawing-tool supported on the carriage and having independent movement thereon, the rotatable hollow spindle and the matrix carried thereby, the ejector, means for temporarily disconnecting the carriage on each re- IOO IZO.

Lul-n movement thereof, menus for then rotating the spindle to release the tool fromthe nished screw-Cap, and to return the tool the externJ ot' its independent movement, and means for then operating the ejector, the said several means operating in succession in the manner described.

In testimony whereof I alx my signature in presence of iwo Witnesses.

GUSTAV RICHTER.

Vitnesses:

A. DRAUTZ, WM. HAHN. 

